/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.lucene.codecs.compressing;


import java.io.IOException;

import org.apache.lucene.store.DataOutput;

/**
 * A data compressor.
 */
public abstract class Compressor {

  /** Sole constructor, typically called from sub-classes. */
  protected Compressor() {}

  /**
   * Compress bytes into <code>out</code>. It it the responsibility of the
   * compressor to add all necessary information so that a {@link Decompressor}
   * will know when to stop decompressing bytes from the stream.
   */
  public abstract void compress(byte[] bytes, int off, int len, DataOutput out) throws IOException;

}
